Thank you. That works great for the bounce, but I can't use the solid behavior because of what I have planned for the player. The player can't be obstructed by the solid crates. I tried toggling the solid behavior on and off for when the player overlaps the crate, but then if the player is overlapping the crate and the solid behavior is disabled, the rock doesn't bounce.
I searched the forums and manual and there doesn't seem to be a way to make solids conditional. If that option was available, this would be a great solution. I think my best option is to find a way to fake the bounce without solids and physics.
Sorry, forgot to mention the thing about solids in my initial post.